package com.peng.demo1;

public class ServiceImpl implements service{
    @Override
    public void add() {
        System.out.println("增加一个元素");
    }

    @Override
    public void delete() {
        System.out.println("删除一个元素");
    }

    @Override
    public void update() {
        System.out.println("更新一个元素");
    }
}
